My car's exhaust was leaking, and while it was leaking the car would make a popping sound under load. The car would shake along with it. So i finally got my gasket from MAC that i ordered FOUR weeks ago, and installed it. I took the car out and when i give it some gas, i hear a deep popping sound, the car doesnt want to accelerate and the car shakes. I made sure my CAI was no leaking along with the MAF, i backed the timing adjuster back to stock, and yet the car still drives poorly. Any ideas? This thing is up for sale